Carburetor mounting device



April 1, 1953 A. E. KOLBE 2,828,726

CARBURETOR MOUNTING DEVICE Filed Nov. 19, 1956 2 Sheets-Sheet l e iiimmL INVENTOR. @592- deffiezfwe BY ATTORNEY April 1, 1958 A. E. KOLBE 2,828,725

CARBURETOR MOUNTING DEVICE Filed Nov. 19, 1956 2 Sheets-Sheet 2 IN V EN TOR.

A TTOP/VE) rates CARBURETOR MOUNTING DEVICE Application November 19, 1956, Serial No. 622,861

7 Claims. (Cl. 123-119) The present invention relates to a device for mounting a carburetor upon an engine and more particularly providing such a device having a single fastening means.

Heretofore it has been customary to mount a carburetor upon the engine inlet manifold by the use of a plurality of fastening means such as studs or bolts, each of which must be individually secured to the inlet manifold. Any such fastening means is adapted to retain the carburetor on the manifold against relative axial and rotary movement.

The present device has for its object the provision of a simple and effective device whereby through the manipulation of a single bolt a carburetor may be immovably mounted on an inlet manifold.

In addition to providing a novel device whereby a single fastening means may be utilized to mount a carburetor on the inlet manifold, the stud member through which this is achieved is uniquely constructed in a way to permit an air cleaner to also be simply mounted upon the carburetor resulting in a device for simply and expeditiously mounting the air cleaner and carburetor upon the engine.

The subject mounting device will hereinafter be described in detail.

in the drawings:

Figure 1 is a partially sectioned elevational View of the present invention utilized in mounting an air cleaner and carburetor upon an engine manifold;

Figure 2 is a plan view of the carburetor;

Figure 3 is a bottom view of the carburetor; and

Figure 4 is an enlarged perspective view of the fastening stud.

Referring to Figure l in the drawings, an engine manifold is shown at 10, a carburetor at 12 and an air cleaner at 1 The inlet manifold has a pad formed thereon and upon which the carburetor 12 is adapted to be supported. In the carburetor used for illustrative purposes there are a plurality of induction passages 13 each of which is adapted to transmit a portion of the combustible mixture to the inlet manifold. It is to be understood, however, that the present invention is in no way limited to the type of carburetor illustrated.

As best seen in Figure 2, a wall is formed in the carburetor body and extends longitudinally thereof dividing the induction passages into primary and secondary air passages 22 and Wall 2h has a longitudinally extending cylindrical portion 25 having an opening 26 formed therethrough and which opening when the carburetor is mounted upon the inlet manifold is adapted to align with a threaded bore 28 formed in pad 16. The lower end of wall portion 25 terminates in a radially inwardly projecting flange 27.

A stud or bolt 30 is adapted to be inserted through opening 26 in carburetor wall 2e and further to be threaded into bore 28 in the manifold pad 16 to thereby fix the carburetor 12 against the axial movement on the aforesaid manifold. As will be seen in Figures 1 and 4, bolt 30 includes a pair of axially spaced shoulders 32 and 34.

2,828,7Zh Patented Apr. 1, 1958 ice The respective end portions of bolt 30 are externally and internally threaded at 36 and 38 with the end 50 being adapted to be threaded into bore 28 of pad 16 until shoulder 32 abuts flange 27 of wall 29 clamping the flange between the shoulder and the surface of the pad,

In order that the clamping or axial pressures exerted by bot 3 through the carburetor body be equally distributed, particularly for sealing purposes, it is preferable that the opening 26 in wall 20 of the carburetor be essentially centrally disposed with respect to the carburetor.

A plurality of studs 40 extend upwardly from the pad 1% of the inlet manifold and are adapted to cooperate with corresponding openings 42 formed in the bottom wall, or throttle body 44, of the carburetor in order that the carburetor mixture passages be properly aligned with those in the inlet manifold and further to prevent relative rotative movement between the carburetor and manifold. It is, of course, obvious that it would be possible to reverse the relationship between the studs 41 and openings 42 so that they would be mounted respectively on the throttle body and manifold rather than as shown. Studs are press fitted within recesses 46 formed in pad 16. It is also possible to otherwise dispose the studs 40 upon pad 16 as by making them integral therewith or screwing them therein.

it has been found preferable that the studs be diametrically aligned with respect to the pad 16 in order to reduce the number required and at the same time insuring against relative movement of the carburetor with respect to the manifold.

The internally threaded end of bolt 30 is formed as a nut St in order that a wrench may be applied thereto to thread the bolt into pad 16 as described above.

As already noted the end Sfi of the bolt is internally threaded at 3% for the purpose of receiving an air cleaner retaining stud 52. Thus, with the air cleaner 14 posi tioned upon the carburetor, the. stud 52 may be threaded into end Sil of bolt 30. providing a simple device through which the air cleaner and carburetor are assembled upon the inlet manifold.

it is apparent that structural modifications of the subject fastening device are possible without departing from the intended scope of the present invention.

I claim:

1. An internal combustion engine comprising an inlet manifold member, a carburetor member, said manifold having a pad for supporting the carburetor in operative relation therewith, said carburetor having a centrally disposed opening adapted to align with a similar opening in said pad, a bolt element disposed within said openings and adapted to secure said carburetor upon said manifold against axial movement, stud means projecting axially from one of said members to engage with the ,1 other of said members to prevent relative rotation between said members.

2. An internal combustion engine comprising an inlet manifold member, a carburetor member, said manifold having a pad for supporting the carburetor in operative relation therewith, said carburetor having a centrally disposed opening extending longitudinally therethrough, a threaded bore formed in said pad and adapted to be axially aligned with said central carburetor opening, a bolt member having a threaded end and a shoulder axially spaced from said threaded end, said bolt being adapted to be disposed in said carburetor opening and threaded into said bore so that said shoulder engages the carburetor clamping the latter against axial movement to said manifold, stud means projecting axially from one of sa1d members to engage with the other of said members to prevent relative rotation between said members.

3. An internal combustion engine as defined in claim 2 in which said stud means includes a pair of stud eleu ments projecting upwardly from said pad and diametrically disposed on opposite sides of said bore.

4. An internal combustion engine comprising a carburetor having an induction passage, a wall member extending longitudinally of said carburetor and dividing said induction passage into a plurality of induction passages, said Wall having a centrally disposed cylindrical portion including an opening extending longitudinally therethrough, an inlet manifold having a pad upon which said carburetor is adapted to be mounted, said pad including a threaded bore adapted to be axially aligned with the longitudinal opening in said cylindrical Wall portion, a plurality of stud members projecting upwardly from said pad and adapted to coact with a corresponding number of openings in the lower wall of said carburetor, a bolt member adapted to be disposedwithin said opening and threaded within said bore, said bolt including a shoulder member being adapted to engage said wall whereby the carburetor may be clamped to said inlet manifold.

5. An internal combustion engine comprising a carburetor having an induction passage, a wall member extending longitudinally of said carburetor and dividing said induction passage into a plurality of induction passages,

said wall having a centrally disposed cylindrical portion including an opening extending longitudinally therethrough, an inlet manifold having a pad upon which said carburetor is adapted to be mounted, said pad including a threaded bore adapted to be axially aligned with the longitudinal opening in said cylindrical wall portion, the lower end of said cylindrical wall portion terminating in a flange, a plurality of stud members projecting upwardly from said pad and adapted to coact with a corresponding number of openings in the lower wall of said carburetor, a stud member adapted to be disposed within said opening and threaded within said bore, said bolt including a shoulder member adapted to engage said flange whereby the carburetor may be clamped to said inlet manifold.

6. An internal combustion engine comprising a carburetor having an induction passage, a wall member extending longitudinally of said carburetor and dividing said induction passage into a plurality of induction passages, said wall having a centrally disposed cylindrical member adapted to be disposed within said opening and threaded within said bore, said bolt including a shoulder member adapted to engage said wall whereby the carburetor may be clamped to said inlet manifold, ar air cleaner to be mounted on said carburetor and having a central opening therethrough in axial alignment with the opening in the cylindrical wall portion of said carburetor, a stud means adapted to be disposed in said air cleaner opening and secured to said bolt whereby the air cleaner may be clamped to said carburetor.

7. An internal combustion engine comprising a carburetor having an induction passage, a tubular member formed in and extending longitudinally of said carburetor, an inlet manifold having a pad upon which said carburetor is adapted to be mounted, said pad inciuding a threaded bore adapted to be axially aligned with the tubular member, a plurality of stud members projecting upwardly from said pad and adapted to coact with a corresponding number of openings in the lower wall of said carburetor, a bolt member adapted to be disposed Within said opening and threaded within said bore, said bolt including a shoulder member adapted to engage said tubular member whereby the carburetor may be clamped to said inlet manifold, an air cleaner to be mounted on said carburetor and having a central opening therethrough in axial alignment with the tubular member, the end of the bolt remote from said pad being internally threaded, a stud means being adapted to be disposed in said air cleaner opening and threaded into the internally threaded portion of said bolt whereby the air cleaner may be clamped to said carburetor.

No references cited. 

